Weft detector on transferrer with auxiliary detector



Decfz, 1926.

R. G. TURNER WEFT DETECTOR ON TRANSFERRER WITH AUXILIARY DETECTOR Filed July 2l, 1926 fxi` Patented Dec. 28, 1926.

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EASSACHSETTS.

assisteren-.ro `o'itcrfrifren e i sancire-seras; ,n ,ooiaronerron or tviirr DETECTOR on aannemen-nn vrtiirnunrtrnrv nnrncfron.

Application led July 21,

rlhis invention relates to improvements'in wciftdetectors for looms and more particul arly to the type employed in regularly vmoving transterrers tor Wett replenishing looms.

in Patent lilo. 1,372,816 to Ryon there is shown loom having ak regularly reciprocated transierrerarm which ismoved dovvn to present a detector carried thereby to the upper sur-tace of the bobbin on' each; detect ing piel: of the loom and infccpendingapplication Ser. No'. 78,181 there isfshovvn a inodiieation of this type ot feele'r `wherein spring pressed plunger islocked by' a pivoted latch or hook member Which is 'tripped to release the `plunger at the timeot' substantial -exhaustionot' Wett. It has been found that detector-'s of this type are prone to inove toward and accidentally release the latch and it is the principal object or' the present invention to supply a yarn engaging device tor the latch which vvill hold said latch from accident-al indicating movement so longf suliicient weft is present.

It is a further object ot` my invention* to provide the plunger holding latch' vvithian auxiliary detector the purpose of which is to prevent releasing of the plunger should the latch be accidentally engaged by the primary detector When stitlicient yarn is present.

The invention isy eet forth in connection with the type of detector-shown in my copending' application Ser. No.` 120,491 vvheieorought into play at the time the transterrer tending to give the latter an indicating e lent, but it is to be underetood-tha'tthe ctor shown hereininay' be used in conjunction with the types oi motions settortu J,n the co-i'ieiicliiig applications heretotore mentioned and that l am not limited to the particular type of primary detector shown herein, it being sufficient for the prcsent invention to have the. detector movable in the'direction ot the length of the bobbiii the time otindication ot Wett exhaustion.

TWith these and other objects in View which will appear asthe descriptionwproceeds,v my invention resides in the. coinbination and arrangement of parte hereinafter describec and set forth in the claims.

ln the accompanying drawings wherein l in the energy stored in a .moving detector is i was. Aserial no. lee-,elia

have shown a convenient embodiment of my invention,

Figi. l is' a `vertical section througli that portion ot the transfer-'rer arm which eX# tends overt-he shuttle when the latter is' boxed on the magazinev side' ot thelloom and havinglniy invention applied thereto, show# ing theldetector in Contact Wit-h a bobbin ia'ving. suthcient- VWett thereon,

Fig. 2- is a View similar toilig; l1 butV with the 'detector in Contact with substantially er':liaistedl bobbinand showing the parts in the .l position theyassunie when indicating Wett exhaustion, andl Fig. 31 is Aa detailvertical section online Ble-3 otlig.' 2. v

Referring to* the 4drawings itavill be seen that l haveprovided atransterrer arm l having' an extended portion l1'l ,iingabove and parallel-to thearis: oithe shuttlerand bobbi'n. i! plunger lQ-'isslidablymounted in a portion" of the. tia-nsferrer arm and has as shoulder i3 which receives the inner thrust ot' afconipression springle the outer end' of Which-bears againsta clip l5 held to the transierrer arm by screw' 116. .The-plunger 12 is provided With a hea-d- 17 .which engages thel clip to limit inward movementof the plunger under'the action ot spring 13.

A latch 1S is pivotedlas'at 19V to the transferrer anni and moves; inna vertical slot extendingv through the arm', said latch having a-'lioolril which normally engages' thc head 17 to 4hold the parts-in the position shown in Figli.y A. spring 2:2 tends normally to :move the latch in a right handdirec'tioii around -its pivot so thatadepending finger Q3 ot the latch -vill normally occupy thev position shovvnin Fig. l. i

The detecting element indicated at 24 is pivoted as at Qtofa lever 26 moving in the slot- 2G about a. 'studQT extending across said slotand secured tol the transterrer arm. A boss Q8 on the lever 26 serves tov stop a set screw 29passing` through an extension 30 of the detector to' limit right hand motionV of the detector about its pivot. A tension spring 3l'. is connected tol the extension 30 and hasthestraightened part thereof passed through an ear .32 and held therein in adjusted position by a setscreWBS. Thematter .tliiis"tai described is: substantially the saine as that set forth in several coependi-ng leo applications, such for instance, as Ser. No. 7 8,181.

As previously stated the type of detector chosen to show one embodiment of my present invention depends for its operative movement upon the inertia of the supporting lever 26 and in order to hold the latter in normal raised position I provide a tension spring 43:0 having an end straightened and passing through a portion of the transferrer arm and secured thereto by a screw 41 and having the other end secured to a horn d2 preferably cast integral with the lever 26. Atail 43 extends to the right of the stud 27 and engages a portion of the transferrer arm to limit upward movement ofthe lever 26 under action of screw 40. The matter heretofore described may be substantially the same as that set forth in the patent and applications previously indentified and forms no part of my present invention.

In carrying out my present improvements I mount an auxiliary detector plunger 5C in the finger 23 and provide said plunger with a guide pin 51 which moves in a vertical slot 52 formed in the finger 23. The upper part of the latch is provided with a cap plate 53 secured in place by a screw 54 and positioned to limit downward movement of a cotter pin 55 extending through the upper reduced end 56 of the auxiliary detector 50. A compression spring 57 surrounds the reduced end 56 and. lies between the cap 53 and the lower head port-ion of the auxiliary detector. The latter may be formed wedge-shaped, the pin 51 serving Vto align the penetrating edge of the aux-` iliary detector with the coils of yarn. Under normal conditions the parts are in the position indicated in Fig. 1 with the plunger 12 retained in locked position by engagement of the head 17 and hook 21, a continuance of this position being insured by the action of spring 22. rlhe auxiliary plunger detector 50 will be in its lowest position relatively to the finger 23 and the detector'24t will be spaced from the finger as indicated in Fig. 1. fis the transferrer arm is brought to a sudden stop as it approaches the bobbin B the detector 2d and supporting lever 26 will continue in their downward movement by reason of the inertia of the lever 26 and the detector will tend to move lengthwise along the bobbin to give an indication of weft exhaustion. The roughened surface of the detector lwill ordinarily prevent this movement but should the detector slip on a sufficient supply of weft so as to engage the finger 23, angular movement of the latch 18 will be prevented because of the fact that the auxiliary detector 50 will have entered the yarn on the bobbin, Locking engagement between the head 17 and the hoolr 21 will therefore be maintained under these conditions.

As soon as insufficient weft for continued weaving appears under the transferrer arm the detector 2li will slide along the bobbin to the position indicated in Fig. 2 and will engage the finger 2?) and move the latter in a countercloekwise direction about the pivot 19 against the action of spring 22. inasmuch as there is insuflicient yarn to engage the auxiliary plunger 50 and restrain sliding movement thereof said plunger will not resist angular movement of the latch and the latter will therefore be moved to the position indicated in Fig. 2, hoolr 21 releasing head 17 and spring 14 moving plunge 12 to the position shown in Fig. 2. This position, as set forth in Patent No. 1,372,316, corresponds to an indication to the weft replenishing mechanism. Upon a subsequent upward movement of the transferrer arm the plunger 12 will be returned to the position shown in Fig. 1 by mechanism not shown but set forth in the aforesaid patent, and spring 22 will serve to return the latch to normal holding position.

F rom the foregoing it will be seen that have provided a transferrer with a primary weft detector and have furthermore pro` vided an auxiliary detector associated with the latch which holds the plunger in inoperative position, the auxiliary detector preventing premature indication of weft exhaustion but permitting proper indicating movement of the detector when the weft has been depleted to a predetermined degree.

Having thus described my invention it will be apparent that changes and modifications may be made therein by those skilled in the art without departing from the spirit and scope of the invention, and l do not wish to be limited to the details herein disclosed but what I claim is:

1. in a weft detector for a loom having a regularly moving transferrer arm and a surface to be detected, an indicating plunger mounted thereon, a latch to hold said plunger in inoperative position, a primary weft detector having a movement toward the latch when indicating weft exhaustion, and an auxiliary detector operatively related to the latch and engaging the surface to be de tected to prevent improper movement of the latch should the primary detector have a premature latch engagingmovement.

2. ln a weft detector for a loom having a regularly moving transferrer arm and a surface to be detected, a member receiving a regula-r movement toward the surface to be detected, a primary detector mounted on the member and presented to the surface to be detected on detecting beats of the loom, an indicating element movable on the transferrer arm, a locking device to hold the element normally in inoperative position, and any auxiliary weft detector operatively related to the locking device and engaging the surface to he detected to prevent unlocking movement of the locking device should the latter he engaged hy the primary detector when sufficient weft is present.

3. ln a weft detector :for a loom having a regularly moving` transferrer arm and a surface to he detected, a weft detector supported by and movable With respect to the transferrer arin and having an indicating movement along a Substantially exhausted hobbin, a spring stressed plunger slidaloly mounted on the transferrer arm, a pivoted latch normally holding the plunger in inoperative position, and an auxiliary detector mounted on and movable With respect to the latch and engaging the surface to loe detected to prevent unlocking movement of the latch relatively to the plunger should the primary detector engage the latch when sumcient yarn is present.

In testimony whereof I have hereunto affixed my signature.

RICHARD G. TURNER. V 

